Vacuum cleaner



Oct. 20, 1925. 1,558,006

. P. A. FISKER VACUUM CLEANER Filed March 22, 1922 Patented 20, 1925. v

"UNITED STATES PEDER mnnnsnn rrsxnn, or eornimnenn, DENMARK, ASSIGNOR TOnzssns. rrsxna Y 1,558,006 PATENT OFFICE.

& NIELSEN A/S, OF COPENHAGEN, DENMARK.

VACUUM CLEANER.

Application filed larch 22, 1922. Serial No. 545,648.

To all whom it may concern:

Be it known that I, Penna Armnnsnn Fis- KER, subject of the Kingdom ofDenmark, and residing at Copenhagen, Denmark, have invented certain newand useful Improvements in Vacuum Cleaners, of which the following is aspecification.

The present invention relates to an improvement in vacuum cleaners,especially the small, easily transportable vacuum cleaners held by thehands during the cleaning and in which the suction nozzle is located 0nthe vacuum cleaner proper. The present invention deals particularly withthe construction of the vacuum cleaner housing or casing. The completecasing of the vacumm cleaner comprises two main chambers, detachablyconnected with each other and one of which chambers forms a filterchamber solely, and completely encloses the filter, while the otherchamber forms a machine chamber containing the motor and the fan. Themachine chamber is divided into two intermediate plate w ch plateextends between the two separate portions of the propeller. In thismanner one portion of the fan is located in one of the parts of the ma'chine chamber, while the other portion of the fan is located in theother chamber. The machine chamber has the handle of the machine pivotedto it at one end, while the other end is detachably connected to thefilter chamber. A further advantage secured by this construction is thatboth bearings of the motor and'fan shaft are readily accessible becauseof their being located at the extreme ends of the shaft and furtherforming parts of the upper and lower walls of the machine chamber.Because of the fan of the vacuum cleaner being located between the lowerbearing and the rotor of the motor the construction of the vacuumcleaner may be much simpler than has been pints by means of an Fig. 4 isa detail of Fig. 2 on an enlarged scale;

Fig. 5 is a detail showing the filter holdmg means.

The vacuum cleaner which is usually cigar or torpedo-shaped consists'oftwo portions, viz, the housing 1 containing the suction fan and themotor, and the conical portion 2 containing the filter. As shown in Fig.2 the housing 1 consists of two portions, a lower 3 and an upper 4 heldtogether by screws 5 or the like. The bearings of the rotary shaft arelocated at the upper and lower wall of the housing and according to theinvention the lower bearing 6 is located at the outside of the lowerwall of the housing, so that the bearing is easily accessiblc andsimultaneously the construction of the entire housing 1 is made muchsmaller than when the lower bearing is located between the fan and themotor, as is the case in prior constructions.

In the constructional form shown in Figs. 2 and 4 the intermediate plate7, which leads inwardly the air leaving the first por* tion 8 of the fanso that it passes into the second portion 9 of the fan near the shaft,is held in the housing 1 by having its edge pinched between the wallsand 4 forming the two chambers of the housing 1. The intermediate plate7 may carry or be brovided with ribs 10 carrying another plate 11 (theso-called hole plate), which serves also the purpose of leading the airin the correct manner in the housing so that it passes the same in themanner indicated by the arrow in Fig. 2.

The conical portion 2 containing the filter 12 is detachably secured tothe housing 1, by a pair of clamps 13 oivotally connected on the filtercontainer 2 and so shaped that they may expand resiliently when turnedin sidewardly over the screws 5 assembling the two portions of thehousing 1. The clamps 13 consist of two branches connected by a crosspiece 14 at the upper end of the clam and by a little bolt or pin 15carrying a rol er 16 which may be pressed on to the head of the screw 5whereby the portion 2 is secured to the housing 1 by a resilientpressure arising from a small deformatlon of the clamps 13 caused by theclosing.

The filter 12 is located in known manner in the conical filter container2 where it is carried, according to the invention, by a tube open atboth en special filter fastening, the form of which depends ontha-t ofthe filter. In the constructional form shown (in Fig. 5) it consists ofa perforated, substantially discshaped part 17, having a tubular orbarshaped extension 18 supporting the lower portion of the filter. Thedisc-sha ed portion 17 carries along its edge a rub or ring 19 makingthe joint between the housing 1 and the filter container 2 air-tightwhen the filter is in place. The portion 17 is so shaped that the edgeof the filter may be easily fixed thereto, as by a cord 7 laid aroundthe edge of the filter which surrounds the projection extending down-Wardly from the portion 17. As abovementioned the lower end of thefilter is held by a bar or'a tube 18 terminating in a suitably shapedhead to which the filter 12 is secured.

As indicated in Fig. 1 the vacuum cleaner is provided with a tubularhandle 21 pivota-lly connected with the housing 1 so that it may be swuninto a-position along side of'the housing 0 the vacuum cleaner duringtransport or when ,it is to be stored. As mentioned, the handle is inthe form of a tube which serves in proper manner to receive theelectrical connections not shown in the drawings. The handle may be se-Lc'ured in the various positions by a suitable butterfly or wing nut 22,Fig. 3.

The lower portion of the filter container 2 has formed on its end acylindrical extension 23 on which the suction nozzle 24 is pivotallymounted.

Within the lower end of the filter chamber 2 is a check or fla its andmade of a thin piece of fabric or the like. When the vacuum cleaner isoperating this tube will be sucked up so that it stands almost verticaland forms an open tube as shown in Fig. 2. As soon as this suctionceases this tube will collapse owing to the more or less verticalposition of the vacuum cleaner, and in collapsing it will close thelower end of the container 2 so that the dust therein is prevented fromfalling out. I

The constructional details shown and described may obviously be' variedwithout departing from the principle of the invention.

Claims:

1. An improvement in vacuum cleaners of that kind which are held by thehands valve 25 formed of a.

during the cleaning, com rising at filter chamber and a machine 0 amber,a filter completely contained in the filter chamber, an intermediateplate in the machine chamber dividing said chamber into two compartmentsthe joint between the two compartments of the machine chamber bemg alongthe edge of the intermediate plate, peripherally located means securingthe two compartments to each other, a motor in one compartment of themachine chamber, a suction fan in said compartment in axial alignmenttherewith, a second axially aligned fan in the other compartment of themachine chamber, and detachable connecting meansfor securing the filterchamher to the machine chamber which connecting means are held inposition by the per.

as set forth in claim 1, wherein the detachable connecting means forsecuring the filter chamber to the machine chamber consist of resilientdeformable clamps which are held in securing position by being stretchedover the peripherally located securing means which secure the twocompartments of the machine chamber together.

4. A11 im rovement in vacuum cleaners of that kind which are held by thehands during the cleaning comprising a filter chamber and a machinechamber, means for detachably connecting the two chambers, a filtercompletely contained in the filter chamber said filter chamber beingprovided with a cylindrical extension for the attachment of a nozzle, anintermediate plate dividing the machine chamber intotwo compartments, amotor and an axially aligned suction fan in the other compartment,peripherally located means maintaining the intermediate plate inposition and securing the two compartments to each other, saidcompartments joining each other along the ed e of the intermediateplate.

in testimony whereof I affix my signature.

PEDE-R ANDERSEN FISKER.

